[PATCH] firmware: raspberrypi: Use dev_err_probe() to simplify code

[Yuan Can]

In the probe path, dev_err() can be replaced with dev_err_probe()
which will check if error code is -EPROBE_DEFER and prints the
error name. It also sets the defer probe reason which can be
checked later through debugfs.

Signed-off-by: Yuan Can <yuancan at huawei.com>
---
 drivers/firmware/raspberrypi.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/firmware/raspberrypi.c b/drivers/firmware/raspberrypi.c
index 4b8978b254f9..a9d7aafc6309 100644
--- a/drivers/firmware/raspberrypi.c
+++ b/drivers/firmware/raspberrypi.c
@@ -268,12 +268,9 @@ static int rpi_firmware_probe(struct platform_device *pdev)
 	fw->cl.tx_block = true;
 
 	fw->chan = mbox_request_channel(&fw->cl, 0);
-	if (IS_ERR(fw->chan)) {
-		int ret = PTR_ERR(fw->chan);
-		if (ret != -EPROBE_DEFER)
-			dev_err(dev, "Failed to get mbox channel: %d\n", ret);
-		return ret;
-	}
+	if (IS_ERR(fw->chan))
+		return dev_err_probe(dev, PTR_ERR(fw->chan),
+				     "Failed to get mbox channel\n");
 
 	init_completion(&fw->c);
 	kref_init(&fw->consumers);
-- 
2.17.1